<?php
echo "计算用户输入两个数据的加减乘除的结果 \n";
echo "请输入两个数据，用逗号分隔开来：\n";
$count = fscanf(STDIN, "%d, %d %s", $a, $b, $other);
var_dump($count, $a, $b, $other);//Ctrl+/ 注释/取消注释
if ($count > 2) {//count代表成功接收的数据个数
    echo "不要在数据后面添加乱七八糟的东西~\n";
} else if ($count < 2) {
    echo "请按要求的格式来输入数据~\n";
} else {//正好输入两个数据
    $jia = $a + $b;
    $jian = $a - $b;
//$cheng=$a*$b;
//$chu=$a/$b;
    echo "$a + $b = $jia\n";
    echo "$a - $b = $jian\n";
//echo "$a * $b = $cheng\n";
//echo "$a / $b = $chu\n";
}

